S
M
T
W
T
F
S
30
85°
65°
31
82°
67°
1
90°
71°
2
90°
71°
3
89°
69°
4
81°
63°
5
79°
58°
6
79°
60°
7
78°
59°
8
74°
57°
9
75°
59°
10
80°
59°
11
76°
57°
12
74°
56°
13
73°
57°
14
75°
55°
15
77°
60°
16
73°
59°
17
75°
55°
18
70°
50°
19
74°
55°
20
78°
59°
21
78°
59°
22
77°
58°
23
79°
58°
24
78°
57°
25
77°
55°
26
77°
55°
27
76°
56°
28
76°
56°
29
77°
55°
30
74°
51°
1
72°
51°
2
74°
52°
3
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Oakmont
Oakmont's September 2026 forecast shows daily high temperatures ranging from 70° to 90°, with overnight lows between 50° and 71°. The average high for September is 77° with an average low of 58°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Oakmont. See also: October | November | December.
